How long do peanut leaves live with spider mites?

Spider mites are the world's pest mites and occur in many places in China. Peanut red spider swarm gathers on the back of peanut leaves to suck sap, the front of the affected leaves initially loses green, showing gray-white small spots, more than 50 heads of activity on the raw small leaves, often within 8-10 days all the peanut leaves dry up and fall off, the whole plant dies. Due to the habit of spun silk and net forming in adult mites, there is usually a layer of white wire mesh on the surface of peanut leaves on the affected plot, and a large number of peanut leaves are bonded together, which seriously affects the photosynthesis of peanut leaves, hinders the normal growth of peanuts, makes the pods shriveled, and reduces the yield a lot.

Occurrence conditions: more than one generation, drought and little rain, suitable temperature and humidity, conducive to rampant harm. 10 to 20 days before the peak occurs, the average daily temperature is about 26 degrees Celsius, and the relative humidity is about 65% on average.

During the occurrence period, due to its small size, the storm tender pumpkin effectively eliminated it and controlled the rampant occurrence.

Control methods: red plants have a wide range of hosts, strong reproductive ability, more generations, and strong drug resistance, so it must be controlled in time to ensure the quality and yield of peanuts to the greatest extent.

1) Agricultural control:

After autumn, remove weeds and litter in the field and at the edge of the field, cultivate the land during autumn sowing, and bury the overwintering adult mites deep underground; Before the seedlings are unearthed in spring, the weeds inside and outside the field should be eradicated in time, which can effectively suppress the source of insects. In addition, through reasonable irrigation and fertilization, the plants can be promoted to grow robustly, enhance their pest tolerance and reduce losses;

2) Pharmaceutical prevention and control

Go to the plot to check, pay attention to the treatment in the occurrence stage of the spot, and control it in the occurrence stage of the dot as much as possible. In addition, you can add some liquid fertilizers with complete nutrients, such as Fengqia Duobao, which is conducive to the recovery of leaves as soon as possible. For the prevention and control of red spiders, you can choose to use acaricides for control, such as conventional sprays such as 300 times of 45% sulfur suspension or 2000-3000 times of 73% alkyne mite special emulsifiable concentrate;

When the number of adult mites is small and eggs and mites are concentrated, it can also be controlled with 1500-2000 times of 5% thiobenone emulsifiable concentrate; When the insects are mixed, it can be sprayed with 15% pyridoxin emulsifiable concentrate or 20% pyridafen wettable powder 1500 times liquid spray.

Remind everyone to pay more attention to observation in ordinary times, in order to achieve early detection and early prevention, to avoid unnecessary losses, want to know more about pesticide use technology, pest control methods, you can go to the crop guard column for consultation!

There is a medicine for this pest.

1. Outdoor flowers and plants.

Spider mites mainly overwinter in egg or fertilized female adult mites in plant branch cracks, leaf litter, and shallow soil crevices around the rhizosphere. The following spring, when the temperature rises and the plants begin to sprout and grow, the overwintering female adult mites begin to be active. After the leaf is spread, it is transferred to the leaf to cause damage, first on both sides of the main vein on the back of the leaf, and gradually spreads over the whole leaf from several small groups.

When the occurrence is large, it is drawn and crawled on the surface of the plant and spread by wind. Under normal circumstances, the peak period is reached in mid-May, and the peak period is from July to August, especially from late June to early July. It often makes the leaves of the whole tree yellow and white.

It takes an average of 10 to 15 days for the mite to complete a generation, and it can be used for both hermaphroditism and parthenogenesis, with females mating only once in their lifetime and males mating multiple times. The early and late appearance time of overwintering female adult mites is closely related to the rapid nutritional status of the host itself. The more severely the host is damaged, the worse the nutritional status, and the earlier the appearance of overwintering mites; On the contrary, by early November, there were still individuals who were harmed.

Second, indoor flowers are like slag grass.

All the flowers and plants outside, whether they are picked back from cuttings of branches and leaves, or buy ready-made potted flowers at the flower market, are likely to bring red spiders home.

Be sure to look carefully, and if there are white spots on the surface of the leaves (a symptom of the leaves being sucked by red spider mites), insist that you do not take them home. Potted flowers are generally used with pesticides, sometimes you can't see it when you buy it, and if you find white spots on the leaves after 7-10 days, it is the red spider in the original pot**.

Please add a detailed explanation.

You're talking about leaf mites Arachnid ticks close relatives of spiders There are many possibilities for how this is born There are many possibilities It can be brought in the soil There may be eggs on the leaves themselves Small things are not easy to guard against Maybe it floats with the wind Leaf mites can also produce silk through glands, so it is not impossible to float.